Balance ball for an office chair???

OK – I was watching the Biggest Loser the other night and one of the trainers, Bob, suggested using a balance ball instead of an office chair if you work at a desk. It sounds really strange, right? However, I’m sitting here contemplating if I should get myself a balance ball to bring into work. I sit for a good 6 hours a day and if I could get an additional workout by changing what I sit on, that would be cool. Would it be unprofessional to be sitting on a big A** ball instead of on a chair? Will my co-works decide it would be funny to play hide the ball or kickball with my new chair? Do I want to deal with all the heckling I will get if I bring in this new “chair”? Will I fall off and hurt myself? In all honesty I can kind of see myself getting up really quickly, inadvertently kicking the giant ball, watch it ricochet off my desk or a wall, and slamming me into the ground. Even after asking these questions of myself, I came back to the conclusion that heck yeah I’m going to go get me a big balance ball and bring it in as a chair substitute. I don’t care if it makes me look like a freak or a dork, if it truly gives me an extra mini-workout throughout the day then it is definitely worth it. I’m guessing after a few weeks I’ll have a story or two to share about the balance ball “chair”.